Problems pane not showing all pylint messages

[jeffgabhart]

Environment data

• VS Code version: 1.23.0
• Extension version (available under the Extensions sidebar): 2018.4.0
• OS and version: Windows 7
• Python version (& distribution if applicable, e.g. Anaconda): 2.7.14
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Relevant/affected Python packages and their versions:

Actual behavior

Pylint output shows message, but it doesn't appear in the Problems pane. I'm guessing this is specific to triple quoted string literals and how pylint returns -1 for the column.

Expected behavior

All Pylint output messages appear in the Problems pane

Steps to reproduce:

1. Create test.py

TEST = """
    {}
    """.format(
        '',
        ''
    )

2. Save
3. Python Output pane shows

##########Linting Output - pylint##########
No config file found, using default configuration
************* Module test
1,0,convention,C0111:Missing module docstring
3,-1,error,E1305:Too many arguments for format string

4. Problems Pane only shows the message for "Missing module docstring"

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

##########Linting Output - pylint##########
No config file found, using default configuration
************* Module test
1,0,convention,C0111:Missing module docstring
3,-1,error,E1305:Too many arguments for format string

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

[jeffgabhart]

Here is pylint saying they won't fix the negative value.
pylint-dev/pylint#1822

and their sample that also doesn't show up in the Problems pane

import threading

""" 
Some string here
"""